US4301239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic backing layer for unsubbed polyester film
Assignee: EIDP Inc
•
Filing: 1979-12-05
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Granted: 1981-11-17
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Expires: 1999-12-05
Abstract
Abstract Dimensionally stable energy-treated polyester film is coated with an opaque antistatic backing layer of carbon-filled polyacrylate containing an aziridine cross-linking agent.
Inventors
- 👤 Conrad E. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:07
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/853; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/044; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/064; G03C1/775; G03C1/79; G03C1/795; G03C1/7954; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; C08L; C08L61/00; C08L61/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
72 words
An article of manufacture consisting of a dimensionally stable energy-treated film base coated on one side with an opaque antistatic backing layer, characterized in that the backing layer is applied from an aqueous dispersion of a carbon-filled film-forming polyacrylate containing free carboxyl groups, in admixture with a polyfunctional aziridine cross-linking agent, followed by drying and thermal curing and a silver halide emulsion layer coated on the opposite side of the film base.
Claim 2
Dependent Claim
72 words
An article of manufacture consisting of a dimensionally stable energy-treated film base coated on one side with an opaque antistatic backing layer, characterized in that the backing layer is applied from an aqueous dispersion of a carbon-filled film-forming polyacrylate containing free carboxyl groups, in admixture with a polyfunctional aziridine cross-linking agent, followed by drying and thermal curing and a silver halide emulsion layer coated on the opposite side of the film base.
Claim 3
Dependent Claim
20 words
The article of claim 1 wherein the film-forming polyacrylate is a terpolymer of methyl methacrylate, ethyl acrylate, and methacrylic acid.
Claim 4
Dependent Claim
12 words
The article of claim 1 wherein the film-forming polyacrylate is poly(styrene/butylmethacrylate/butylacrylate/acrylic acid).
Claim 5
Dependent Claim
17 words
The article of claim 1 wherein the film base is a biaxially oriented heat set polyethylene terephthalate.
Claim 6
Dependent Claim
12 words
The article of claim 1 wherein the film base is a polyolefin.
Claim 7
Dependent Claim
12 words
The article of claim 1 wherein the film base is polyethylene-clad paper.
Claim 8
Dependent Claim
96 words
An energy-treated, biaxially oriented polyester film base having adhered to one side thereof a silver halide emulsion layer and having adhered to the opposite side thereof a layer of an opaque antistatic backing layer coated, post-stretch, from an aqueous dispersion comprising a. a terpolymer of the following composition 1. 50 to 66 percent by weight of methyl methacrylate, 2. 29 to 45 percent by weight of ethyl acrylate 3. about 5 percent by weight of methacrylic acid b. a polyfunctional aziridine c. from 0.25 to 0.50 parts by weight of carbon black per part of terpolymer.
Claim 9
Dependent Claim
96 words
An energy-treated, biaxially oriented polyester film base having adhered to one side thereof a silver halide emulsion layer and having adhered to the opposite side thereof a layer of an opaque antistatic backing layer coated, post-stretch, from an aqueous dispersion comprising a. a terpolymer of the following composition 1. 50 to 66 percent by weight of methyl methacrylate, 2. 29 to 45 percent by weight of ethyl acrylate 3. about 5 percent by weight of methacrylic acid b. a polyfunctional aziridine c. from 0.25 to 0.50 parts by weight of carbon black per part of terpolymer.
Claim 10
Dependent Claim
93 words
An energy-treated polyethylene-clad paper support having adhered to one side thereof a silver halide emulsion layer and having adhered to the opposite side thereof a layer of an opaque antistatic backing layer coated from an aqueous dispersion comprising a. a terpolymer of the following composition 1. 50 to 66 percent by weight of methyl methacrylate, 2. 29 to 45 percent by weight of ethyl acrylate 3. about 5 percent by weight of methacrylic acid b. a polyfunctional aziridine c. from 0.25 to 0.50 parts by weight of carbon black per part of terpolymer.
Claim 11
Dependent Claim
93 words
An energy-treated polyethylene-clad paper support having adhered to one side thereof a silver halide emulsion layer and having adhered to the opposite side thereof a layer of an opaque antistatic backing layer coated from an aqueous dispersion comprising a. a terpolymer of the following composition 1. 50 to 66 percent by weight of methyl methacrylate, 2. 29 to 45 percent by weight of ethyl acrylate 3. about 5 percent by weight of methacrylic acid b. a polyfunctional aziridine c. from 0.25 to 0.50 parts by weight of carbon black per part of terpolymer.
Claim 12
Independent Claim
99 words
A method of preparing a photographic film in which a silver halide emulsion layer is coated on a polyethylene terephthalate film base comprising: a. extruding the film base, stretching it in two directions and heat-setting, b. energy treating one side of the film base, and then coating it with an antistatic backing layer comprising a carbon-filled methyl methacrylate-ethyl acrylate-methacrylic acid copolymer and a polyfunctional aziridine, c. heating the coated film base for a time and at a temperature sufficient to bond the copolymer thereto, and d. coating the opposite side of the film base with a gelatino-silver halide emulsion.
Claim 13
Independent Claim
99 words
A method of preparing a photographic film in which a silver halide emulsion layer is coated on a polyethylene terephthalate film base comprising: a. extruding the film base, stretching it in two directions and heat-setting, b. energy treating one side of the film base, and then coating it with an antistatic backing layer comprising a carbon-filled methyl methacrylate-ethyl acrylate-methacrylic acid copolymer and a polyfunctional aziridine, c. heating the coated film base for a time and at a temperature sufficient to bond the copolymer thereto, and d. coating the opposite side of the film base with a gelatino-silver halide emulsion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |